docs: def check_num_rows_of_parameter_array(param_array, correct_num_rows, title):
      """
      Ensures that `param_array.shape[0]` has the correct magnitude. Raises a
      helpful ValueError if otherwise.
  
      Parameters
      ----------
      param_array : ndarray.
      correct_num_rows : int.
          The int that `param_array.shape[0]` should equal.
      title : str.
          The 'name' of the param_array whose shape is being checked.
  
      Results
      -------
      None.
      """
      if param_array.shape[0] != correct_num_rows:
          msg = "{}.shape[0] should equal {}, but it does not"
          raise ValueError(msg.format(title, correct_num_rows))
  
      return None